summaryrefslogtreecommitdiff
path: root/arch/arm/include/asm/stacktrace.h
blob: 8f54f9ad8a9b93ae756471e0d60f01d665a38f7a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_STACKTRACE_H
#define __ASM_STACKTRACE_H

#include <asm/ptrace.h>
#include <linux/llist.h>

struct stackframe {
	/*
	 * FP member should hold R7 when CONFIG_THUMB2_KERNEL is enabled
	 * and R11 otherwise.
	 */
	unsigned long fp;
	unsigned long sp;
	unsigned long lr;
	unsigned long pc;
#ifdef CONFIG_KRETPROBES
	struct llist_node *kr_cur;
	struct task_struct *tsk;
#endif
};

static __always_inline
void arm_get_current_stackframe(struct pt_regs *regs, struct stackframe *frame)
{
		frame->fp = frame_pointer(regs);
		frame->sp = regs->ARM_sp;
		frame->lr = regs->ARM_lr;
		frame->pc = regs->ARM_pc;
#ifdef CONFIG_KRETPROBES
		frame->kr_cur = NULL;
		frame->tsk = current;
#endif
}

extern int unwind_frame(struct stackframe *frame);
extern void walk_stackframe(struct stackframe *frame,
			    int (*fn)(struct stackframe *, void *), void *data);

#endif	/* __ASM_STACKTRACE_H */